OvmfPkg/VirtioPciDeviceDxe: implement IOMMU-like member functions

[mirror_edk2.git] / OvmfPkg / VirtioPciDeviceDxe / VirtioPciFunctions.c

diff --git a/OvmfPkg/VirtioPciDeviceDxe/VirtioPciFunctions.c b/OvmfPkg/VirtioPciDeviceDxe/VirtioPciFunctions.c
index 5f86914265eadcffa9a6b2508e91eedcb0417284..bd912cca9b29d47855817a49c080dd4472b7bd4c 100644 (file)
--- a/OvmfPkg/VirtioPciDeviceDxe/VirtioPciFunctions.c
+++ b/OvmfPkg/VirtioPciDeviceDxe/VirtioPciFunctions.c
@@ -5,6 +5,7 @@
   Copyright (C) 2012, Red Hat, Inc.\r
   Copyright (c) 2012, Intel Corporation. All rights reserved.<BR>\r
   Copyright (C) 2013, ARM Ltd.\r
+  Copyright (C) 2017, AMD Inc, All rights reserved.<BR>\r
 \r
   This program and the accompanying materials are licensed and made available\r
   under the terms and conditions of the BSD License which accompanies this\r
@@ -271,3 +272,60 @@ VirtioPciSetDeviceStatus (
   return VirtioPciIoWrite (Dev, VIRTIO_PCI_OFFSET_QUEUE_DEVICE_STATUS,\r
       sizeof (UINT8), DeviceStatus);\r
 }\r
+\r
+EFI_STATUS\r
+EFIAPI\r
+VirtioPciAllocateSharedPages (\r
+  IN  VIRTIO_DEVICE_PROTOCOL  *This,\r
+  IN  UINTN                   NumPages,\r
+  OUT VOID                    **HostAddress\r
+  )\r
+{\r
+  VOID        *Buffer;\r
+\r
+  Buffer = AllocatePages (NumPages);\r
+  if (Buffer == NULL) {\r
+    return EFI_OUT_OF_RESOURCES;\r
+  }\r
+\r
+  *HostAddress = Buffer;\r
+  return EFI_SUCCESS;\r
+}\r
+\r
+VOID\r
+EFIAPI\r
+VirtioPciFreeSharedPages (\r
+  IN  VIRTIO_DEVICE_PROTOCOL  *This,\r
+  IN  UINTN                   NumPages,\r
+  IN  VOID                    *HostAddress\r
+  )\r
+{\r
+  FreePages (HostAddress, NumPages);\r
+}\r
+\r
+EFI_STATUS\r
+EFIAPI\r
+VirtioPciMapSharedBuffer (\r
+  IN      VIRTIO_DEVICE_PROTOCOL  *This,\r
+  IN      VIRTIO_MAP_OPERATION    Operation,\r
+  IN      VOID                    *HostAddress,\r
+  IN OUT  UINTN                   *NumberOfBytes,\r
+  OUT     EFI_PHYSICAL_ADDRESS    *DeviceAddress,\r
+  OUT     VOID                    **Mapping\r
+  )\r
+{\r
+  *DeviceAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress;\r
+  *Mapping = NULL;\r
+\r
+  return EFI_SUCCESS;\r
+}\r
+\r
+EFI_STATUS\r
+EFIAPI\r
+VirtioPciUnmapSharedBuffer (\r
+  IN VIRTIO_DEVICE_PROTOCOL    *This,\r
+  IN VOID                      *Mapping\r
+  )\r
+{\r
+  return EFI_SUCCESS;\r
+}\r